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Wednesday, August 12, 2020 | History

2 edition of Effects of cortex flaps on the low-speed aerodynamic characteristics of an arrow wing found in the catalog.

Effects of cortex flaps on the low-speed aerodynamic characteristics of an arrow wing

Long P Yip

Effects of cortex flaps on the low-speed aerodynamic characteristics of an arrow wing

by Long P Yip

  • 45 Want to read
  • 18 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Aerodynamics, Supersonic -- Testing,
  • Wind tunnels -- Testing,
  • Vortex-motion -- Testing

  • Edition Notes

    StatementLong P. Yip and Daniel G. Murri
    SeriesNASA technical paper -- 1914
    ContributionsMurri, Daniel G, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Langley Research Center
    The Physical Object
    Pagination61 p. :
    Number of Pages61
    ID Numbers
    Open LibraryOL14933016M

    Planform effects on the supersonic aerodynamics of multibody configurations A Review of technologies applicable to low-speed flight of high-performance aircraft investigated in the Langley by foot subsonic Effects of upper surface modification on the aerodynamic characteristics of the NACA airfoil section. extreme arrow wing, strut bracing, multiple bodies Autoland certification is also a problem because systems based on wind tunnel data and predicted aerodynamic characteristics often require corrections derived from expensive flight testing. including tunnels with moving ground planes to enhance their low-speed-in-ground-effect fidelity.

    A wind tunnel investigation was made of the aerodynamic characteristics of a foot semispan, externally-blown jet flap model. The model was equipped with a single inch diameter, ducted fan with a pressure ratio. The effects of flap size, fan vertical location, and wing sweep on the longitudinal aerodynamic characteristics were studied. aerodynamic theory, the purpose of high lift devices, types of high lift devices, procedures for the use offlaps, and flap management. nASIC SECJlON. v-ii. ¥tnnm-PLAIN FLAP SPLIT fLAP. of the flap produces the effect of a large amount ofcamber added well aft on the chord. As shown in Figure 1, the basic effect of the.

    The wing area can be computed if the spanwise distribution of local section chord c(y) is known using S = Z b/2 −b/2 c(y)dy = 2 Z b/2 0 c(y)dy, () where the latter form assumes bi-lateral symmetry for the wing (the usual case). While the span characterizes the lateral extent of the aerodynamic forces acting on the wing, the mean aerodynamic. the downwind wing. The effect is reduced to a slight extent in the crabbed approach since the airplane is more nearly aligned with the wind. When using a wing-low approach, the lowered wing partially blocks the upwind flap. The dihedral of the wing combined with the flap .


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Effects of cortex flaps on the low-speed aerodynamic characteristics of an arrow wing by Long P Yip Download PDF EPUB FB2

Effects of vortex flaps on the low-speed aerodynamic characteristics of an arrow wing. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch.

The aerodynamic properties, including lift, drag, lift-to-drag ratio and induced drag, were measured and analyzed in a low-speed wind tunnel. The effects of thickness ratio were found to be.

SUMMARY An investigation of the subsonic longitudinal aerodynamic characteristics of a modified arrow-wing model was conducted in the Langley 4- by 7-Meter Tunnel. The results of the investigation indicated that deflecting the leading edqe and trailing edge in combination could promote an attached-flow condition at the wing leading edge.

Efficiency enhancement and noise reduction are the two critical factors in the wind turbine design. In this paper, the effects of trailing-edge flap on the aerodynamic performance and noise characteristics of NACA airfoil and vertical axis wind turbine (VAWT) were investigated, and the geometric parameters including flap angle, flap position and flap length were by: 5.

The main characteristics of these high-lift flaps are also summarised in Table 2. The effect of wing-body interference on the drag and lift increments of split'and slotted flaps is discussed in section 7, whilst section 8 summarises the aerodynamic effects of wing leading-edge sIots.

The effect of flaps on induced drag is dealt with in section 9. The aerodynamic characteristics, pressure distribution and flowfield evolution of an 80°/65° double-delta wing model have been studied in Φ m low speed wind tunnel at CARDC by means of force.

Aerodynamic characteristics of two-dimensional smart flap under the ground effect have been assessed by a numerical simulation. In this process, a pressure-based implicit procedure to solve Navier–Stokes equations on a nonorthogonal mesh with collocated finite volume formulation is.

Study the Influence of a Gap between the Wing and Slotted Flap over the Aerodynamic Characteristics of Ultra-Light Aircraft Wing Airfoil (a) (b) Fig. 1 (a) pure wing airfoil NACA and (b) configuration with slotted flap. slotted flap is shown to provide higher maximum CL than any other devices (plain flaps and split flaps), the.

Aerodynamic Effects of Boundary Layer Trip Strips on the Flow over a DU91W airfoil stall is caused by flow separation on the wing, the characteristics of the stall are associated with the initial The trip strip is indicated by the red arrow.

Figure 5. Experimental measurements of lift coefficient as a. Lowering flaps increases the wing's camber and allows the aircraft to fly at a smaller angle of attack (AOA). Flaps Lowered Take this wing, starting in a clean configuration. When the pilot lowers the flaps, two things immediately happen: the wing camber and the AOA both increase.

The camber increases because flaps change the shape of the wing, adding more curvature. This. Comparing the aerodynamic characteristics of the mechanical-flap wing and the three-element morphing-flap wing (figure 22), the morphing-flap wing has greater lift until a flap deflection of 10°, but the drag force increases as well.

The application of a morphing airfoil enables a minimum lift/drag ratio loss of % at the angle of attack of. The results showed that the aerodynamic characteristics of partial-span plain flaps were, in general, similar to those of split flaps of the same span, but that the lift and the drag were less for the wing with plain flaps than for the wing with split flaps of comparable size.

fairly pronounced discontinuity at the flap hinge line. The effects of various combinations of wing leading-edge flap deflections on the longitudinal aerodynamic characteristics of wing-fuselage configura- tion (strake off) at M = and are presented in figures 6 and 7, respectively.

The wing configuration of a fixed-wing aircraft (including both gliders and powered aeroplanes) is its arrangement of lifting and related surfaces. Aircraft designs are often classified by their wing configuration.

For example, the Supermarine Spitfire is a conventional low wing cantilever monoplane of straight elliptical planform with moderate aspect ratio and slight dihedral. - High-wing Cessnas and similar aircraft, where the tailplane is squarely in the wing's downwash, experience (3) quite strongly, so might be expected to pitch up with flap application.

- Warriors and similar have middling effects, because the stabilator is affected by the wing's downwash but is not in the strongest part of it. This new book reports on the latest research in the area of aerodynamic efficiency of various fixed wing, flapping wing, and rotary wing concepts.

It presents the progress made by over 50 active researchers in the field from Canada, Europe, Japan, and the United States. It is the only book. the numerical treatment of jet-flap wing theory, N.A.S.A. studies of external-flow jet-flap arrangements 5 (Fig.

2), the application of jet flaps to helicopter rotors by Dorand 4 and others, and jet-flap 'spoilers' as a method of roll control. Wing Planform Shape & Geometry Aspect ratio, taper ratio, sweep, dihedral, wing area & loading. Other Wing Design Features Vortex generators, wing stall fences, spoilers.1/8/ Dr Derek Bray, DAPS 2.

Non-Dimensional Coefficients Used for comparing wing aerodynamics characteristics: 1 VV 2 S. L / qS Lift Coefficient (CL) = lift / 2 1 VV 2 S. Drag characteristics at small deflections are much like the slotted flap; Because of structural complexity and difficulty in sealing the slots, Fowler flaps are most commonly used on larger airplanes; Blown Flap: An aircraft with wing-mounted propellers, exhibits a blown flap effect; Provides extra airflow for wings by blowing air over the surfaces.

Effect of large amplitude pitching motions on the unsteady aerodynamic characteristics of flat-plate wings. Aerodynamic foundations for use of unsteady aerodynamic effects in flight control. Effect of Gurney Flap on Unsteady Wake Vortex.

Joseph Katz on the book "Low-Speed Aerodynamics" (Second Edition) published by Cambridge University Press in Rotor airfoil aerodynamics 8. A method of sizing an engine and propeller for a light sport aircraft is described and thrust curves plotted to determine maximum theoretical speed.The predominant aeroelastic effect on a transport wing is, of course, bending under aerodynamic load, which effectively washes out the wing twist of a swept wing.

In addition to this primary effect, deflecting any flap will apply an additional local torque and thus change the local twist of a wing. A deflected flap also alters the local.EFFECT OF FLAP DEFLECTION ON SECTION CHARACTERISTICS OF S AIRFOIL Dan M.

Somers January ABSTRACT The effect of small deflections of a percent-chord, simple flap on the section charac- teristics of a tip airfoil, the S, designed for to meter, stall-regulated, horizontal-axis wind turbines has been evaluated theoretically. The decrease in maximum lift .